package sword_to_1;

import node.ListNode;

public class LeeCode_25 {
    public static void main(String[] args) {

    }
    private static ListNode mergeTwoLists(ListNode l1, ListNode l2) {
        ListNode dummy = new ListNode(0);
        ListNode cur = dummy;
        while (l1 != null && l2 != null){
            if (l1.val < l2.val){
                cur.next = new ListNode(l1.val);
                l1 = l1.next;
                cur = cur.next;
            }else {
                cur.next = new ListNode(l2.val);
                l2 = l2.next;
                cur = cur.next;
            }
        }
        if (l1 == null){
            cur.next = l2;
        }else {
            cur.next = l1;
        }
        return dummy.next;
    }
}
